is it normal to feel tired after b12 injection I All the Time. Do I Need a Shot?: Shawn Veiseh, M.D.: Family Medicine Why Do I Feel Worse
Description
Known as a mitochondrial peptide, it works at the cellular level to regulate how the body produces and uses energy

Daytime sleepiness decreases
Larsen, MD

In two trials employing 1000 g/day oral vitamin B 12 , there was no clinically relevant difference in vitamin B 12 levels when compared with IM vitamin B 12
This is something that you are your doctor will decide before you begin receiving treatments
B12 overdose symptoms include skin rashes, itching, upset stomach (nausea, vomiting, diarrhea), b12 overdose headache, and feeling anxious or nervous